Deep-eutectic solvent based on ascorbic acid and preparation method and application of deep-eutectic solvent

A low eutectic solvent, ascorbic acid technology, applied in organic chemical methods, skin care preparations, food science and other directions, can solve problems such as instability, oxidation or decomposition of ascorbic acid, and achieve light color, low environmental pollution, and reagent prices. low cost effect

Inactive Publication Date: 2017-02-15
HENAN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ascorbic acid (or erythorbic acid) is unstable and prone to oxidation or decomposition when exposed to heat or oxygen, which affects its use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Add choline chloride and ascorbic acid with a stoichiometric ratio of 1:1 (69.8 grams of choline chloride and 95.0 grams of ascorbic acid) into the flask in sequence, and stir for 2 hours at 80°C under nitrogen protection. After completion of the reaction, the material in the flask was poured into the beaker, which was a clear and transparent viscous liquid weighing 163.0 grams, and the reaction yield was 98.9%.

Embodiment 2

[0017] Add choline chloride and erythorbic acid (69.8 grams of choline chloride and 95.0 grams of erythorbic acid) with a stoichiometric ratio of 1:1 to the flask in sequence, under nitrogen (or replaced by argon or carbon dioxide) protection conditions Under the condition of heating at 95°C, stir for 0.5 hours; after the reaction, the contents of the flask were poured into a beaker. It was a clear and transparent viscous liquid, weighing 163.2 grams, and the reaction yield was 99.0%.

Embodiment 3

[0019] Add choline chloride and ascorbic acid with a stoichiometric ratio of 2:1 (139.6 grams of choline chloride and 95.0 grams of ascorbic acid) to the flask in sequence, and heat at 65°C under nitrogen protection (or vacuum condition) Stirring under the conditions for 6 hours; after the reaction, the material in the flask was poured into a beaker, and it was a clear and transparent viscous liquid weighing 233.1 grams, and the reaction yield was 99.3%.

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PUM

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Abstract

The invention discloses a deep-eutectic solvent based on ascorbic acid and a preparation method and application of the deep-eutectic solvent. The deep-eutectic solvent is obtained by using choline chloride and the ascorbic acid (or erythorbic acid) as raw materials (wherein a stoichiometric ratio of choline chloride and the ascorbic acid is 1:1-2:1) and stirring for 0.5-12h while heating at 60-100 DEG C under conditions of protection by inert gas (like nitrogen, argon and carbon dioxide) or vacuumizing. In the preparation method, a deep-eutectic principle is utilized, and the ascorbic acid (or the erythorbic acid) which is unstable to heat or oxygen and choline chloride form intermolecular hydrogen bonding so as to prepare the liquid-state deep-eutectic solvent which is clear and transparent at room temperature. The preparation method has the advantages that preparation is simple, reagents are low in price and nontoxic, environment pollution is little, stability is high, and the deep-eutectic solvent is shallow in color. The deep-eutectic solvent is especially suitable for being used in the field of extracting, separating and storing prone-to-oxidation substances, food (feed) additives and daily chemicals.

Description

technical field [0001] The invention relates to the technical field of deep eutectic solvents, in particular to an ascorbic acid-based deep eutectic solvent and its preparation method and application. The deep eutectic solvent is a new type of deep eutectic solvent prepared in a certain way using choline chloride and ascorbic acid (or erythorbic acid) in a certain stoichiometric ratio as raw materials. Background technique [0002] After mixing two or more substances, the mixture that wets or liquefies is called eutectic mixture. The deep eutectic solvent refers to a two-component or multi-component eutectic mixture composed of a certain stoichiometric ratio of hydrogen bond acceptors and hydrogen bond donors, and its freezing point is significantly lower than that of the pure substances of each component. melting point. Among them, the hydrogen bond acceptors that make up the deep eutectic solvent are mostly compounds such as quaternary ammonium salts, and the hydrogen bo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07B61/00A23L29/00A61Q19/00
CPCC07B61/00A61Q19/08
Inventor 刘伟侯凡一陈竞男杨国龙宗冰月王芳
Owner HENAN UNIVERSITY OF TECHNOLOGY
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